1.word used instead of goodness,Oh my gosh,or Oh my God
2.a word when u have nothin to say and want to say something random

Briefly, "the realization that each random passerby is living a life as vivid and complex as your own." Originally from the Dictionary of Obscure Sorrows, which has a lot more beautiful neologism definitions like this you might enjoy.

goshness \ˈgäsh- nəs\
1. interjection, euphemism for likeness to God, —used as a mild oath or to express surprise or irritation.

2. used when one is frustrated or fed up. can be used as a substitute or in addition to "gosh" "geez" "shit" "damn" etc.

3. the state of being "gosh" or "god" hence, "goshness"

an expression used to express dissaproval or being annoyed at ones action.

The accidental word mixed with gosh and goodness

When 'gosh' and 'goodness' can't describe your exasperation, and you must combine them in a manner that expresses the indignation, therefore, 'goshness'.